It depends on the context. If you are referring to a specific church or denomination, then use a capital "C." If you are talking about churches in general, then it can be lowercase.
The capital of c is C.
Iglesia is Spanish for church. It can mean a particular building or it can refer, as it does in English, to the universal Catholic (capital C) Church.
Constantinople was the capital of the Eastern Orthodox Church.
Cash A/c....................DR To Capital A/c
Cash a/c Dr to capital a/c Cr or to 'x' capital a/c Cr [ Being capital brought in by X for business]
The Roman Catholic Church has always had its Capital in Rome.
capital A/C Dr To Bank A/c Cr
cash a/c---dr to capital a/c
The duration of Christmas with a Capital C is 1.5 hours.
J. C. C Church has written: 'Mining research review'
interest on captial a/c dr To Partner's capital a/c
C capital C